[Sturdy Construction]: Made from Metal for durability and reliability in silk screen printing applications. [Secure Fastening]: Wide-wing thumbscrew ensures firm attachment to the frame, providing stability during printing. [Versatile Use]: Easily secures screen frames to tables or work surfaces, offering secure and precise positioning. [Perfect Registration]: Features positive locking mechanism for accurate alignment and registration of prints. [Easy Installation]: Simple to install and use, enhancing efficiency in your silk screen printing projects. Colour:Silver Material:Metal Size:85x85x60mm/3.3x3.3x2.4inch Package Contents: 4x Butterfly Frame Hinge Clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.